WO2021144358A1 - Wälzmühle mit geschränkten mahlwalzen - Google Patents
Wälzmühle mit geschränkten mahlwalzen Download PDFInfo
- Publication number
- WO2021144358A1 WO2021144358A1 PCT/EP2021/050682 EP2021050682W WO2021144358A1 WO 2021144358 A1 WO2021144358 A1 WO 2021144358A1 EP 2021050682 W EP2021050682 W EP 2021050682W WO 2021144358 A1 WO2021144358 A1 WO 2021144358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grinding
- roller
- grinding table
- roller mill
- rotation
- Prior art date
Links
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000013590 bulk material Substances 0.000 claims abstract description 14
- 230000001133 acceleration Effects 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011394 gypsum concrete Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/008—Roller drive arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Definitions
- the present invention relates to a roller mill, a method for operating a roller mill and the use of a roller mill for comminuting particulate bulk material.
- roller mills with a grinding table and grinding rollers are known, where the grinding rollers can be rotated by a set angle. It is known from EP 2 252 403 B1, when deactivating one of several drives of a grinding table, to bring one or more grinding rollers out of engagement with the grinding table, and to restrict the remaining grinding rollers to further reduce the radial force. In particular, the prior art teaches to restrict rollers against the direction of rotation of the grinding table, for example in US 1, 661, 297 or DE 32 40 931 A1.
- setting is a Frictional force generated in the direction of the edge of the grinding table, so the grinding roller is rotated by a set angle against the direction of rotation of the grinding table.
- JP 11 156 220 A discloses a set angle range of 3 degrees against the direction of rotation of the grinding table to 0.7 degrees in the direction of the direction of rotation of the grinding table. It is explained here that the motor torque would be too high at set angles against the direction of rotation of the grinding table over 3 degrees. Setting angles of more than 0.7 degrees in the direction of rotation of the grinding table are not recommended, as vibrations are then expected.
- the invention provides a roller mill with a grinding table and grinding rollers, the grinding table being rotatable relative to the grinding rollers about a central axis of the grinding table in a grinding table direction of rotation, so that the grinding rollers roll on a grinding track of the grinding table about a roller axis of rotation. At least one of the grinding rollers is rotated by a set angle in the direction of the direction of rotation of the grinding table, so that the axis of rotation of the roller runs at a radial distance from the central axis of the grinding table.
- the set angle is between 1 degree and 9 degrees.
- the set angle is between 1 degree and 4.5 degrees.
- the set angle is between 1 degree and 3 degrees, between 1 degree and 2 degrees, between 2 degrees and 3 degrees, between 2.5 degrees and 3.5 degrees, between 3 degrees and 4.5 degrees, between 2 degrees and 9 degrees, between 3 degrees and 8 degrees, or between 4 degrees and 7 degrees.
- Set angles over 9 degrees, in particular over 4.5 degrees lead to an unnecessarily high drive torque of the at least one drive of the grinding table without improving the grinding result.
- the roller mill is designed in particular to grind ground material in the form of particulate bulk material.
- the particulate bulk material is in particular ground rock material, for example limestone, gypsum, coal or claystone, mineral bulk material, for example cement or cement raw material, or recycled bulk material, for example recycled gypsum concrete slab material, blast furnace slag, flue gas desulfurization gypsum or fly ash.
- a set angle in the range according to the invention for rotating the grinding roller in the direction of the grinding table rotation increases the shear forces between the grinding roller and the grinding table, since relative speeds, i.e. slippage, now also occur between the grinding roller and the grinding table in the radial direction. These shear forces create additional friction, which in turn creates damping and thereby reduces vibrations. This allows the formation of a uniform grinding bed thickness, in particular preventing the grinding bed from becoming too thin in certain areas. This can also reduce wear on the grinding rollers and the grinding table.
- the offset according to the invention enables the roller mill to run more uniformly, that is to say, in particular, less fluctuating normal forces act between the grinding table and grinding rollers, which enables a more uniform and more efficient grinding process.
- the normal force is the force that acts in the normal direction of the surface of the grinding track from the grinding roller on the grinding table.
- Grist is crushed in the roller mill, but can be pressed again into agglomerates by the grinding pressure, which are then returned to the grinding process or to the grinding table due to their size in the classifier.
- the formation of agglomerates can be avoided by the additional shear forces due to the twist.
- the shear forces break up larger constituents in the ground material, in particular agglomerates and / or scabs, so that their individual particles leave the grinding area via the classifier more quickly.
- the offset has the effect that shear forces act in the radially inner direction of the grinding table. This enables a more thorough grinding process to be achieved.
- the ground particles are captured by an air stream radially outside the grinding table and fed to a classifier.
- fine material that has already reached the desired particle size is separated and discharged, and coarse material that needs to be regrinded is returned to the grinding table.
- coarse material that needs to be regrinded is returned to the grinding table.
- agglomerates are also fed back onto the grinding table.
- the formation of agglomerates can at least be reduced and further overgrinding can be avoided.
- the grinding efficiency increases.
- the roller mill is designed so that the grinding table can only be driven in the direction of rotation of the grinding table relative to the grinding rollers. This can be due, for example, to a drive gear that is only designed for operation in the direction of rotation of the grinding table.
- an electronic control is provided which is set up to control the at least one drive of the grinding table only in such a way that the grinding table rotates in the direction of rotation of the grinding table. This can prevent the roller mill from being operated against the direction of rotation of the grinding table provided, which would have negative effects on the grinding result.
- the grinding roller has a cylindrical shape in the contact area with the grinding track.
- the grinding path is then correspondingly flat.
- the cylindrical shape can in particular achieve that shear forces are generated in the circumferential direction of the grinding table between the grinding table and the grinding roller.
- the flat grinding area between a cylindrical grinding roller and the flat grinding track is advantageous with regard to the transport of the material to be ground on the grinding table.
- the cylindrical shape of the grinding roller can enable a constant slip speed in the transverse direction of the grinding roller.
- the grinding roller is shaped cylindrically at least in the region of 70%, advantageously 80%, still advantageously 90%, of its extent in the axial direction and is optionally rounded off only in its axial edge regions.
- the ratio of the diameter of the grinding roller to the width of the grinding roller is advantageously 1.5 to 6, in preferred embodiments the ratio can be 2 to 5, 3 to 5, 3.5 to 5 or 2 to 4, in more preferred embodiments 3 to 4.
- the width of the grinding roller is quite large, so it is a comparatively narrow grinding roller. In this way, in particular, a high local grinding pressure or a high specific surface pressure can be applied, whereas the occurrence of vibrations or an excessively high drive torque can be avoided.
- the ratio between the radial distance from the central axis of the grinding table to the axial center of the grinding roller and the width of the grinding roller is between 1.5 and 6. In other embodiments, this ratio can also be between 1.5 and 5. In further preferred embodiments, the ratio is between 1.75 and 5 or 3.5 and 5. These ratios allow in particular relatively small grinding rollers with respect to quite large grinding table diameters, which in combination with the inventive setting can provide an advantageous grinding result without increasing vibrations . In particular, the specific work requirement, i.e. drive energy (kWh) per mass (kg), can be reduced be adorned. One of the reasons for this is that the use of energy for breaking up agglomerates, for unnecessary overgrinding, for elastic deformation and / or for vibrations can be avoided.
- the ratio between the radial distance from the central axis of the grinding table to the axial center of the grinding roller and the diameter of the grinding roller is preferably between 0.5 and 1.5. In other embodiments, this ratio can also be between 0.6 and 1.3.
- the grinding path is advantageously formed by a flat area of the grinding table; in particular, the areas of the grinding table that adjoin the grinding path radially on the inside and radially outside are also flat.
- the entire grinding table can be made flat.
- the flat area enables the material to be ground to be transported advantageously through the grinding gap between the grinding roller and grinding table.
- an advantageous transport of ground material in the direction of the interior of the grinding table can be achieved by combining it with the setting angles according to the invention.
- the grinding roller can be rotated about an axially central contact point on the grinding path. This has the advantage that a twist can be achieved without having to change the contact point of the grinding roller. As a result, the introduction of the normal force between the grinding roller and grinding table remains at the same place, which can be advantageous with regard to the storage of the grinding table.
- the rotatability of the grinding roller can in particular be achieved by a circular segment-shaped guide.
- a linear adjustment can be achieved in particular by a linear guide.
- the guides can be designed as guide slots. In particular, it can be fastened by frictional engagement or positive engagement by means of screws.
- several grinding rollers are provided, only a sub-group of the grinding rollers being set.
- all of the grinding rollers in the subgroup are rotated by the set angle in the direction of the direction of rotation of the grinding table. If only a subgroup of the grinding rollers is set, then also non-set grinding rollers are in contact with the grinding table. In one embodiment, all grinding rollers can also be rotated by the set angle in the direction of rotation of the grinding table.
- the roll axis of rotation is parallel to the surface of the grinding table.
- the roller axis of rotation can be provided orthogonally to the axis of rotation of the grinding table.
- the axis of rotation of the grinding table is vertical.
- the roll axis is horizontal. Due to the orthogonality of the roll axis of rotation to the axis of rotation of the grinding table what is achieved is that, starting from the axial center of the grinding roller in the circumferential direction of the grinding roller, slip occurs with respect to the grinding table. Shear forces act in the radially outer area of the grinding path against the direction of rotation of the grinding table and in the radially inner area of the grinding path in the direction of rotation of the grinding table.
- the axis of rotation of the grinding roller can be inclined at an angle of 0.5 degrees to 20 degrees to the surface of the grinding table.
- the axis of rotation of the grinding roller is inclined at an angle of 0.5 degrees to 10 degrees or from 10 degrees to 18 degrees, advantageously from 12 degrees to 15 degrees, with respect to the surface of the grinding table.
- the inclined position of the axis of rotation can in particular be combined with conical rollers.
- the grinding track can also be designed at an angle with respect to the radial direction of the grinding table. Due to the inclined position of the axis of rotation, especially in combination with tapered rollers and / or an inclined grinding path, the slip, and thus the shear forces, between the grinding rollers and the grinding path can be influenced.
- the axis of rotation of the grinding roller is inclined in such a way that it would cut a vector in the radial direction of the grinding table starting from the grinding path in the axis of rotation of the grinding table without being offset.
- a rocking lever is provided, the rocking lever being mounted so as to be pivotable about a bearing axis.
- the grinding roller is in particular rotatably mounted in the Schwinghe bel about the roller axis of rotation, wherein the bearing axis of the rocker arm is advantageously parallel to the roller axis of rotation.
- a height compensation of the grinding roller is achieved with different grinding stock thicknesses, with the roller axis of rotation being displaced in parallel. This means that the grinding gap can remain parallel and only its thickness can be changed. In this way, an even grinding result can be achieved.
- the rocker arm is mounted radially outside of the grinding table in a console that is mounted in the foundation. In this way, the forces acting on the grinding roller can be dissipated directly into the foundation via the rocker arm.
- the invention further provides a method for operating a roller mill described above, the grinding table being rotated at a rotational speed such that a radial acceleration of at least 1 g radially outwards acts on the grinding material on the grinding table in the area of the radial center of the grinding path is the gravitational acceleration constant of 9.81 m / s A 2 (9.81 meters per second squared.
- the grinding table is rotated at a speed that a radial acceleration of at least 1.1 g or at least 1.2 g acts on the grinding material on the grinding table in the area of the radial center of the grinding path.
- the grinding table is rotated at a speed that a radial acceleration of at least 1.3 g, at least 1.4 g or at least 1.5 g acts on the grinding material on the grinding table in the area of the radial center of the grinding path.
- the comparatively high rotational speeds are made possible because the at least one grinding roller rotated by a set angle in the direction of the grinding table rotation direction applies a shear force to the grinding stock, which acts radially inward, and thus the acceleration force acting radially outward on the grinding stock due to the radial acceleration counteracts.
- the invention further provides a method for operating a roller mill, in which grinding rollers roll on a grinding table, the slip speed in the transverse direction of the grinding rollers being constant over at least one contact area in the width of the grinding rollers.
- the method advantageously makes it possible to counteract the formation of agglomerates.
- the method comprises the step of providing at least one grinding roller which is rotated by a set angle in the range from 1 degree to 9 degrees, in one embodiment from 1 degree to 4.5 degrees, in the direction of the grinding table rotation direction.
- the grinding roller is advantageously shaped cylindrically in the contact area with the grinding track.
- the transverse direction of the grinding roller is the axial direction of the grinding roller. Because the grinding rollers transport grist in the direction of the interior, the slip counteracts the centrifugal forces that transport the grist to the outside as a result of the rotation of the grinding table.
- an increased dwell time of the material to be ground in the area of the grinding rollers can be achieved with high grinding table rotation speeds at the same time, which leads to an improved grinding result.
- the invention also provides the use of a roller mill for comminuting particulate bulk material, whereby by setting at least one grinding roller in the direction of rotation of a grinding table, the vibrations of the roller mill compared to the state with unspecified limited grinding rollers can be reduced.
- the vibrations are increased compared to the unrestrained state with appropriate uses.
- the method according to the invention and the use according to the invention enable the reduction of vibrations with the same or even improved grinding result, in particular through the operation of the embodiments of roller mills defined above.
- Figure 1 is a perspective view of a roller mill according to an embodiment of the present invention.
- Figure 2 is a plan view of the inventive embodiment of a roller mill
- Figure 3 is a schematic view of the grinding table and the grinding roller in an inventive embodiment of a roller mill with a representation of the Schlupfge speeds in the direction of rotation of the grinding table;
- FIG. 4 shows a schematic view of the grinding table and the grinding roller in an embodiment according to the invention of a roller mill with a representation of the Schlupfge speeds in the radial direction of the grinding table.
- the roller mill has a grinding table 2 and four grinding rollers 3.
- the grinding table 2 is driven about its central axis 100 in a direction of rotation 200 of the grinding table.
- at least one grinding table drive 4 is provided.
- the grinding roller 3 is mounted in a rocking lever 5 about a roller axis of rotation 300.
- the rocker arm 5 is mounted in a bracket 6 so as to be pivotable about a bearing axis 400.
- the console 6 is attached directly to the foundation.
- hydraulic cylinders 7 can be provided, which are connected to the rocking lever 5 at a distance from the bearing axis 400 and can apply a force to the rocking lever 5 starting from the foundation. This can serve to pivot the grinding rollers 3 out of engagement with the grinding plate 2, or to set the normal force between the respective grinding roller 3 and the grinding plate 2.
- particulate bulk material is introduced, which then moves radially outward on the grinding table 2, so that it is ground between the grinding rollers 3 and the grinding table 2. Then the ground bulk material is exposed to an air flow through a nozzle ring 8 arranged radially outside the grinding table. The air flow feeds the ground bulk material to a classifier, not shown, which can return coarse components to the grinding table 2 and removes sufficiently fine particles from the roller mill 1.
- Fig. 2 is a plan view of the grinding table 2, the grinding rollers 3 and their mounting is shown. The grinding rollers 3 are shown in dashed lines in their non-twisted arrangement, and in solid lines in their twisted arrangement.
- the grinding rollers are rotated by a set angle 500 in the direction of the direction of rotation of the grinding table 200.
- the roller axis of rotation 300 runs at a radial distance 600 from the central axis 100 of the grinding table 2.
- the grinding rollers 3 form a grinding gap in the area of a grinding path 9, in which the particulate bulk material lying on the grinding table 2 is ground by means of normal and shear forces.
- the axial center of the grinding rollers 3 is at a radial distance 700 from the center axis 100 of the grinding table 2.
- the axial center of the grinding roller 3 also defines in particular the radial center of the grinding path 9.
- a partially circular guide can be provided in the console 6, with which the vibration lever 5 can be moved relative to the console 6.
- the set can be followed by the linear movement of the grinding roller 3, in particular in its radial direction.
- Fig. 3 and Fig. 4 the slip between a set grinding roller 3 and the grinding table 2 is shown.
- the speed of the grinding table in the circumferential direction is calculated as a linear function as a function of the radius.
- the speed of the cylindrical grinding roller 3 mounted parallel to the grinding table 2 and orthogonally to its central axis 100, however, is the same along its axial extent.
- the grinding roller 3, driven only by the grinding table 2 runs faster at its radially inner end with respect to the grinding table than the corresponding area of the grinding track 9.
- the grinding roller 3 runs slower than the grinding table 2.
- the roller mill 1 explained above is operated by rotating the grinding table 2 so that the grinding rollers 3 roll on it, a constant slip speed 900 being generated in the transverse or axial direction of the grinding rollers 3 by setting the grinding rollers 3.
- a constant slip speed 900 being generated in the transverse or axial direction of the grinding rollers 3 by setting the grinding rollers 3.
- ground material is transported in the direction of the radial interior of the grinding table 3 or the centrifugal force is counteracted in some areas, so that a better grinding effect is made possible.
- the roller mill can thus be used to reduce vibrations in the roller mill due to the offset, and at the same time to produce an improved grinding result.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17/792,650 US20230059893A1 (en) | 2020-01-14 | 2020-01-14 | Roller Mill Having Grinding Rollers Set At An Angle |
CN202180009235.5A CN115052682B (zh) | 2020-01-14 | 2021-01-14 | 具有经设置的磨辊的辊磨机 |
EP21700221.1A EP4090469A1 (de) | 2020-01-14 | 2021-01-14 | Wälzmühle mit geschränkten mahlwalzen |
BR112022013829A BR112022013829A2 (pt) | 2020-01-14 | 2021-01-14 | Moinho de rolo tendo rolos de moagem ajustados em ângulo |
CA3164379A CA3164379A1 (en) | 2020-01-14 | 2021-01-14 | Roller mill having grinding rollers set at an angle |
AU2021208441A AU2021208441B2 (en) | 2020-01-14 | 2021-01-14 | Roller mill having crosswise grinding rollers |
JP2022543047A JP2023511549A (ja) | 2020-01-14 | 2021-01-14 | 角度が設定された粉砕ローラーを有するローラーミル |
ZA2022/08935A ZA202208935B (en) | 2020-01-14 | 2022-08-10 | Roller mill having crosswise grinding rollers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20151718.2 | 2020-01-14 | ||
EP20151718.2A EP3851195A1 (de) | 2020-01-14 | 2020-01-14 | Wälzmühle mit geschränkten mahlwalzen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021144358A1 true WO2021144358A1 (de) | 2021-07-22 |
Family
ID=69167719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/050682 WO2021144358A1 (de) | 2020-01-14 | 2021-01-14 | Wälzmühle mit geschränkten mahlwalzen |
Country Status (10)
Country | Link |
---|---|
US (1) | US20230059893A1 (de) |
EP (2) | EP3851195A1 (de) |
JP (1) | JP2023511549A (de) |
CN (1) | CN115052682B (de) |
AU (1) | AU2021208441B2 (de) |
BR (1) | BR112022013829A2 (de) |
CA (1) | CA3164379A1 (de) |
CL (1) | CL2022001857A1 (de) |
WO (1) | WO2021144358A1 (de) |
ZA (1) | ZA202208935B (de) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US810830A (en) * | 1905-05-12 | 1906-01-23 | Renfrew Crusher Company Ltd | Pan-and-roller mill for crushing and grinding. |
US1661297A (en) | 1927-04-14 | 1928-03-06 | Clearfield Machine Company | Grinding pan |
DE3240931A1 (de) | 1982-01-25 | 1983-08-04 | F.L. Smidth & Co. A/S, 2500 Koebenhavn | Vertikale rollenmuehle |
DE3490332C2 (de) * | 1983-06-30 | 1994-06-23 | Kobe Steel Ltd | Walzenmühle |
JPH11156220A (ja) | 1997-11-21 | 1999-06-15 | Babcock Hitachi Kk | ローラ式粉砕装置 |
DE102007009723A1 (de) | 2007-02-28 | 2008-09-04 | Polysius Ag | Rollenmühle |
DE102008039541A1 (de) | 2008-08-25 | 2010-03-04 | Polysius Ag | Rollenmühle |
EP2252403B1 (de) | 2008-03-20 | 2014-07-02 | Gebr. Pfeiffer SE | Wälzmühle |
CN105080665A (zh) | 2015-09-06 | 2015-11-25 | 李国良 | 立磨 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006061328B4 (de) * | 2006-12-22 | 2014-01-16 | Gebr. Pfeiffer Ag | Wälzmühle |
WO2015051925A1 (de) * | 2014-03-21 | 2015-04-16 | Loesche Gmbh | Verfahren und vorrichtung zum aufbereiten und trennen eines materials aus einem verbundenen mehrstoffsystem |
CN205056131U (zh) * | 2015-09-06 | 2016-03-02 | 李国良 | 雷蒙磨 |
-
2020
- 2020-01-14 EP EP20151718.2A patent/EP3851195A1/de not_active Withdrawn
- 2020-01-14 US US17/792,650 patent/US20230059893A1/en active Pending
-
2021
- 2021-01-14 JP JP2022543047A patent/JP2023511549A/ja active Pending
- 2021-01-14 CN CN202180009235.5A patent/CN115052682B/zh active Active
- 2021-01-14 BR BR112022013829A patent/BR112022013829A2/pt unknown
- 2021-01-14 EP EP21700221.1A patent/EP4090469A1/de active Pending
- 2021-01-14 CA CA3164379A patent/CA3164379A1/en active Pending
- 2021-01-14 AU AU2021208441A patent/AU2021208441B2/en active Active
- 2021-01-14 WO PCT/EP2021/050682 patent/WO2021144358A1/de active Application Filing
-
2022
- 2022-07-07 CL CL2022001857A patent/CL2022001857A1/es unknown
- 2022-08-10 ZA ZA2022/08935A patent/ZA202208935B/en unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US810830A (en) * | 1905-05-12 | 1906-01-23 | Renfrew Crusher Company Ltd | Pan-and-roller mill for crushing and grinding. |
US1661297A (en) | 1927-04-14 | 1928-03-06 | Clearfield Machine Company | Grinding pan |
DE3240931A1 (de) | 1982-01-25 | 1983-08-04 | F.L. Smidth & Co. A/S, 2500 Koebenhavn | Vertikale rollenmuehle |
DE3490332C2 (de) * | 1983-06-30 | 1994-06-23 | Kobe Steel Ltd | Walzenmühle |
JPH11156220A (ja) | 1997-11-21 | 1999-06-15 | Babcock Hitachi Kk | ローラ式粉砕装置 |
DE102007009723A1 (de) | 2007-02-28 | 2008-09-04 | Polysius Ag | Rollenmühle |
EP2252403B1 (de) | 2008-03-20 | 2014-07-02 | Gebr. Pfeiffer SE | Wälzmühle |
DE102008039541A1 (de) | 2008-08-25 | 2010-03-04 | Polysius Ag | Rollenmühle |
CN105080665A (zh) | 2015-09-06 | 2015-11-25 | 李国良 | 立磨 |
Also Published As
Publication number | Publication date |
---|---|
EP4090469A1 (de) | 2022-11-23 |
CA3164379A1 (en) | 2021-07-22 |
BR112022013829A2 (pt) | 2022-09-13 |
ZA202208935B (en) | 2024-03-27 |
AU2021208441A1 (en) | 2022-08-04 |
EP3851195A1 (de) | 2021-07-21 |
CL2022001857A1 (es) | 2023-02-24 |
CN115052682A (zh) | 2022-09-13 |
CN115052682B (zh) | 2023-10-20 |
AU2021208441B2 (en) | 2024-06-06 |
JP2023511549A (ja) | 2023-03-20 |
US20230059893A1 (en) | 2023-02-23 |
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